close all
o=[0 0];

v1=[3 1];
v2=2*v1;
ceuArrow(o,v2,'r',2)
axis square
axis([-1 7 -1 3])
ceuArrow(o,v1,'b',2)
grid on
xlabel('x_1')
ylabel('x_2')

text(v1(1)+0.25,v1(2)-0.25,'v_1')
text(v2(1)+0.25,v2(2)-0.25,'v_2')
